South Korean President Moon Jae-in has announced he will head to Pyongyang next month for a third summit with North Korean leader Kim Jong-un. Moon will become just the third South Korean president to travel to the North Korean capital. The meeting comes at a time when tension appears to be increasing again between the Trump administration and North Korea. Last week National Security Adviser John Bolton accused North Korea of not taking the steps the Trump administration feels are necessary to denuclearize.